JP5169043B2 - Head mounted display - Google Patents

Description

  The present invention relates to a head mounted display.

  In recent years, various glasses-type image display devices for observing an image displayed on a display such as a liquid crystal panel (LCD) as a virtual image enlarged through an optical system having an eyepiece, a half mirror, and the like have been proposed, and wearable displays. is called. An example of such a wearable display is described in, for example, WO2004 / 061519A1 (Patent Document 1).

  In many cases, this video display device is configured to be mounted on the head in a form wound around the head (referred to as a head-mounted display), and a binocular with a video display system formed at a position corresponding to both eyes. There is a one-eye type in which an image display system is formed at a position corresponding to one of the left and right eyes.

  An example of such a one-eye type head mounted display is shown in FIG. FIG. 1A is a perspective view, and FIG. 1B is a view of the head mounted display as viewed from the left side in FIG. This head mounted display includes ear pads 1 and 2 that hold both ears from the left and right to fix the head mounted display to the head. A speaker is provided in each of the ear pads 1 and 2 and outputs sound to each ear. The ear pads 1 and 2 are fixed to the holding portions 3 and 4 via a universal hinge. The left and right holding portions 3 and 4 (fixing members) are slidably inserted into the headband portion 5 and are connected by the headband portion 5. The headband part 5 has elasticity and gives a biasing force that presses the ear pads 1 and 2 against the ear part from the left and right. The display unit 6 is held by a display unit arm 7, and the display unit arm 7 is coupled to the holding unit 4 via a rotation unit 8 and can be rotated in the front-rear direction when mounted.

  The holding unit 3 is provided with an operation unit 9, and the operation unit 9 is provided with push button switches 10, 11, 12, 13 and a dial 14 which are operation members.

FIG. 1 shows a state in which this head mounted display is used for the left eye, but it can be used for the right eye by rotating the display arm 7 forward and backward by 180 °.
WO2004 / 061519A1 publication

  In a head mounted display as shown in FIG. 1, map information may be displayed as an image. In other words, GPS is attached to grasp the current position, a map is displayed with the direction the user is facing up, the left and right of the user left and right, and the user's rear side down, and the current position is superimposed on it Is displayed.

  In such a case, a magnetic sensor is attached to the head mounted display because it is necessary to display the map with the same direction. However, there is a problem that the output of the magnetic sensor is inverted between when the head mounted display is used for the left eye and when it is used for the right eye.

  This is shown in FIG. 2A shows a state when the head-mounted display is used for the right eye, and FIG. 2B shows a state when the head-mounted display is used for the left eye as viewed from above. It is a figure. In FIG. 2, each reference numeral indicates the same as that shown in FIG. As can be seen from FIG. 2, when used for the right eye, the north direction of the geomagnetic sensor must be pointing to the back of the head, whereas it is used for the left eye Sometimes, the north direction of the geomagnetic sensor must point to the front side of the head. Therefore, when the head mounted display is used for the left eye and when it is used for the right eye, the output of the magnetic sensor is inverted, and the displayed image cannot accurately represent the east, west, north, and south directions. . In such a case, the displayed image must be rotated by 180 ° when the head mounted display is used for the left eye and when the head mounted display is used for the right eye.

  This invention is made | formed in view of such a situation, and makes it a subject to provide the head mounted display which can display an exact azimuth | direction, even when it uses it for right and left eyes.

The first means for solving the above problems is a head mounted display that is used by being mounted on the head and outputs an image to one eye, and the head mounting portion for mounting on the head;
A geomagnetic sensor detecting geomagnetism, and inverting means for inverting the output of the geomagnetic sensor, a display unit outputting and displaying an image based on the orientation information to one eye receives an output of the geomagnetic sensor, the display of the display unit Display rotation means for rotating the display unit 180 degrees, a display arm for connecting and holding the display unit to the head mounting unit, and an eye for displaying an image by rotating the display unit with respect to the head mounting unit. Switching means for switching between left and right, the output signal from the geomagnetic sensor is inverted when the head mounted display is used for the left eye and for the right eye , and the display unit The head-mounted display is characterized in that the display displayed on the screen is rotated 180 degrees .

  The second means for solving the problem is the first means, characterized in that the output signal from the geomagnetic sensor is inverted by a manual switch operation.

The reference form of the present invention is the first means, wherein the inversion of the output signal from the geomagnetic sensor is performed based on the rotation position of the display unit arm.

A third means for solving the above problems is a head-mounted display that is used by being worn on the head and outputs an image to one eye, the display unit outputting and displaying the image to one eye, and the display A display unit arm that holds the unit pivotably in the front-rear direction, and has a geomagnetic sensor that detects geomagnetism, in which the eye that displays an image can be switched left and right by the rotation of the display unit arm, The output signal from the geomagnetic sensor is inverted depending on whether the head mounted display is used for the left eye or the right eye, and the output signal from the geomagnetic sensor is inverted. Is a head-mounted display that is performed by operating a manual switch .

  According to the present invention, it is possible to provide a head-mounted display capable of displaying an accurate orientation regardless of whether the eye is used for the left or right eye.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The mechanical outline of the head mounted display according to the present embodiment is not different from that shown in FIG. 1, but a geomagnetic sensor is attached to the head mounted display mounted on the head.

  FIG. 3 is a block diagram showing an outline of an electric circuit of such a head mounted display. The outputs of the GPS sensor and the geomagnetic sensor are input to the sub CPU, and an arm position detection sensor for detecting the rotation position of the display unit arm 7 is provided. The arm position detection sensor detects whether the head mounted display is used for the left eye or the right eye depending on the rotation position, and can be replaced with a manual setting switch.

  Hereinafter, the flow of processing for inputting from the geomagnetic sensor of the head mounted display will be described with reference to FIG. First, the arm position (whether the head mounted display is used for the left eye or the right eye) is determined by looking at the output of the arm position detection sensor. Alternatively, these are determined by the output of the manual setting switch. Then, it is determined whether or not the determined arm position is the same as the position stored in the memory. (Even in the initial state, the memory stores the arm position for either the left eye or the right eye) (step S1). If it is the same as the position stored in the memory, the process ends without performing any special processing.

  If it is not the same as the position stored in the memory, first, the display screen displayed on the display unit is rotated 180 ° (step S2). Then, the output signal of the geomagnetic sensor is inverted (in fact, the output of the geomagnetic sensor does not invert, so when it is taken into the sub CPU, the east, west, north, and south of the output of the geomagnetic sensor is inverted and read) (step S3). Then, the function of the operation member is reversed before and after. For example, in FIG. 1, the functions of the push button switch 10 and the push button switch 11 are reversed. (Step S4). Finally, the arm position is stored in the memory and the process ends (step S5).

  In this way, when used for the left eye, the output signal of the geomagnetic sensor is read by inverting the east, west, north, and south, so even when the head mounted display is used for the right eye, it is used for the left eye You can recognize the correct direction even when you are.

It is a figure which shows the example of a one-eye type head mounted display. It is a figure which shows a mode that the output of a magnetic sensor is reversed by the case where a head mounted display is used for left eyes, and the case where it is used for right eyes. It is a block diagram which shows the outline | summary of the electric circuit of the head mounted display which is embodiment of this invention. It is a figure which shows the flow of the process which performs the input from the geomagnetic sensor of the d-mount display which is embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Ear pad, 2 ... Ear pad, 3 ... Holding part, 4 ... Holding part, 5 ... Headband part, 6 ... Display part, 7 ... Display part arm, 8 ... Turning part, 9 ... Operation part, 10 ... Push button Switch, 11 ... push button switch, 13 ... push button switch, 14 ... dial

Claims (3)

A head-mounted display that is worn on the head and outputs video to one eye,
A head mounting part for mounting on the head;
A geomagnetic sensor for detecting geomagnetism ,
Reversing means for reversing the output of the geomagnetic sensor;
A display unit that receives and outputs an image based on orientation information in response to the output of the geomagnetic sensor ;
Display rotation means for rotating the display of the display unit 180 degrees;
A display arm for connecting and holding the display unit to the head-mounted unit;
And a switching means for switching the left and right eyes to display an image by rotating the display unit with respect to the head-mounted unit,
When the head mounted display is used for the left eye and for the right eye, the output signal from the geomagnetic sensor is inverted and the display displayed on the display unit is rotated 180 degrees. A head-mounted display characterized by being displayed .   2. The head mounted display according to claim 1, wherein the output signal from the geomagnetic sensor is inverted by a manual switch operation. A head-mounted display that is used while attached to the head and outputs an image to one eye, and a display unit that outputs and displays an image to one eye, and a display unit that holds the display unit so as to be rotatable in the front-rear direction. When the eye that displays an image can be switched between right and left by rotating the display unit arm, and has a geomagnetic sensor that detects geomagnetism, and the head mounted display is used for the left eye The output signal from the geomagnetic sensor is inverted when used for the right eye, and the output signal from the geomagnetic sensor is inverted by a manual switch operation. head-mounted display to be.

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